i'd like a script that helps automate the "magic" scrolling speed (from Meyers CREATING MOTION GRAPHICS) for long blocks of text, like credit rolls. Variables needed to be asked include:
NTSC or PAL or Film, etc.
approx how many seconds

here is a starting pt:
this expression (i didn't write it, but have used it on multiple occasions)
can help to reduce the apparent interlacing flicker on such things as end credit rolls (white text over black background).

[Math.round(position[0]),Math.round(position[1])]

when applied to the position property, it ensures movement on whole pixel increments (no decimals). in combination with other methods, you can have a pretty sexy looking credit scroll at the end of the day.